Daenerys is a true born Targaryen, but in the last season Jon Snow happened to be the son of Rhaegar Targaryen and Lyanna Stark. So he becomes heir to the throne also. My question is how are these two Targaryen are related?!

Ah, I wasn't paying enough attention to the Targaryen male names, figured they were brother and sister! Not sure this is much better, considering what I just saw them do....
– Grimm The OpinerJan 3 '18 at 10:22

1

How can Catelyn and Eddard Stark both died in year 299 A.C.? In the series it seems like every season is a year so if Viserys died in 298, Eddard should have died 298/299 and Catelyn/Robb died in 300/301
– user52558Jan 3 '18 at 11:48